What is a machine?

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What is a machine? by Mind Map: What is a machine?

1. What do we mean by "energy"?

1.1. Scientists define energy as the ability to do work. Modern civilization is possible because people have learned how to change energy from one form to another and then use it to do work. People use energy to walk and bicycle, to move cars along roads and boats through water, to cook food on stoves, to make ice in freezers, to light our homes and offices, to manufacture products, and to send astronauts into space.

1.2. There are many different forms of energy, including Heat Light Motion Electrical Chemical Gravitational

1.2.1. These forms of energy can be grouped into two general types of energy for doing work: Potential or stored energy Kinetic or working energy

2. Machine is a thing which reduces human effort and makes work easy to do. It also reduces labour it also increases the efficiency of the work. It also makes the work more accurate. This is the simple definition. And by book the definition of machine is A machine is a tool containing one or more parts that uses energy to perform an intended action. Machines are usually powered by chemical, thermal, or electrical means, and are often motorised. A simple machine is a device that simply transforms the direction or magnitude of a force, but a large number of more complex machines exist. Examples include vehicles, electronic systems, molecular machines, computers, television, and radio.

3. simple machine, any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work. They are the simplest mechanisms known that can use leverage (or mechanical advantage) to increase force. The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw.

4. A compound machine is a machine that consists of more than one simple machine. Some compound machines consist of just two simple machines. You can read below about two examples—the wheelbarrow and corkscrew. Other compound machines, such as bicycles, consist of many simple machines. Big compound machines such as cars may consist of hundreds or even thousands of simple machines.

5. What is efficiency?

5.1. Devices are designed to waste as little energy as possible. This means that as much of the input energy as possible should be transferred into useful energy stores. How good a device is at transferring energy input to useful energy output is called efficiency. A very efficient device will waste very little of its input energy. A very inefficient device will waste most of its input energy.